package nautilus.lab.activity;

import java.io.File;

import nautilus.lab.R;
import nautilus.lab.renderer.ShadowImageView;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.widget.ImageView;
import android.widget.LinearLayout;

public class MyGalleryActivity extends Activity{
	
	private LinearLayout layout;
	private String externalStoragePath;
	
	@Override
	public void onCreate(Bundle savedState){
		super.onCreate(savedState);
		setContentView(R.layout.img_scroll_view);
		
		layout = (LinearLayout)findViewById(R.id.img_scroll_view_layout);
		
		externalStoragePath = Environment.getExternalStorageDirectory().getAbsolutePath();
		File targetDirector = new File(externalStoragePath);
		
		File[] files = targetDirector.listFiles();
        for (File file : files){
        	layout.addView(insertImageView(file.getAbsolutePath()));
        } 
	}
	
	private View insertImageView(String path){
		Bitmap bm = decodeSampledBitmapFromUri(path, 150, 210);
		//ImageView imageView = new ImageView(getApplicationContext());
		ShadowImageView imageView = new ShadowImageView(getApplicationContext(), bm);
	    imageView.setLayoutParams(new LayoutParams(170, 220));
	    //imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
	    //imageView.setImageBitmap(bm);
	    
	    return imageView;
	}
	
	private View insertLayoutImageView(){
		return null;
	}
	
	public static Bitmap decodeSampledBitmapFromUri(String path, int reqWidth, int reqHeight) {
	     Bitmap bm = null;
	     
	     // First decode with inJustDecodeBounds=true to check dimensions
	     final BitmapFactory.Options options = new BitmapFactory.Options();
	     options.inJustDecodeBounds = true;
	     BitmapFactory.decodeFile(path, options);
	     
	     // Calculate inSampleSize
	     options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);
	     
	     // Decode bitmap with inSampleSize set
	     options.inJustDecodeBounds = false;
	     bm = BitmapFactory.decodeFile(path, options); 
	     
	     return bm;  
	    }
	
	public static int calculateInSampleSize(BitmapFactory.Options options, int reqWidth, int reqHeight) {
		// Raw height and width of image
		final int height = options.outHeight;
		final int width = options.outWidth;
		int inSampleSize = 1;
		        
		if (height > reqHeight || width > reqWidth) {
			if (width > height) {
				inSampleSize = Math.round((float)height / (float)reqHeight);   
		    } else {
		    	inSampleSize = Math.round((float)width / (float)reqWidth);   
		    }   
		}
		return inSampleSize;   
	}

}
